Door Lock Cylinder SYNOLOGY LOCK CYLINDER D6 40/40mm Nickel

SYNOLOGY LOCK CYLINDER D6 40/40mm Nickel is a replacement door lock cylinder with symmetric 40/40mm dimensions designed for standard cylindrical lock cases. The nickel finish offers a corrosion-resistant surface and neutral appearance suitable for a range of interior and exterior doors. This cylinder provides keyed entry control and is intended to fit into locks that accept a 40/40mm profile, delivering a straightforward mechanical solution for replacing worn or damaged cylinders.

Advantages

The SYNOLOGY D6 cylinder is manufactured to match common dimensional standards for easy replacement without modifying the existing lock case. Its symmetric 40/40mm length enables reversible installation and compatibility with both left- and right-handed doors. The nickel plating increases resistance to wear and environmental exposure while maintaining a low-profile look. The cylinder provides mechanical key control without electronic components, offering a simple, serviceable solution for conventional door hardware.

Suitable for

• Residential front and interior doors that accept a 40/40mm cylinder
• Light commercial doors such as offices or small retail premises
• Replacement of worn or damaged standard profile cylinders
• Applications requiring a symmetric, reversible cylinder for left or right handing

Key specifications

• Cylinder type: standard euro/profile-like cylindrical lock cylinder
• Dimensions: symmetric 40 mm / 40 mm (overall length split equally)
• Finish: nickel-plated surface for corrosion resistance
• Operation: mechanical keyed entry (no electronic components)
• Compatibility: designed for standard cylindrical lock cases accepting 40/40 mm cylinders

How to use

To replace an existing cylinder, first remove the fixing screw from the lock case and withdraw the old cylinder following the lock manufacturer’s instructions. Insert the SYNOLOGY D6 40/40mm cylinder so that the cam aligns with the lock mechanism, then secure it with the fixing screw and test operation by turning the key from both sides. Ensure the cylinder sits flush with the door face and that the key turns smoothly without binding. If necessary, check strike plate alignment and door clearance to prevent interference.

Usage recommendations

Use the SYNOLOGY D6 cylinder in locks that specifically require a symmetric 40/40 mm unit. For external doors, verify that the nickel finish and mechanical security level meet local requirements and consider pairing the cylinder with a compatible high-security escutcheon or reinforced lock case if additional protection is needed.